Answer:
The term that describes The direction of Auxin transport in a plant is : polar transport
Step-by-step explanation:
Auxin is a plant hormone that plays a crucial role in various aspects of plant growth and development, including cell elongation, apical dominance, and tropisms (response to stimuli such as light or gravity).
Polar transport refers to the movement of auxin in a unidirectional manner, typically from the apical meristem (the growing tip of the plant) towards the base or from the shoot to the root.
This transport occurs mainly in the vascular tissues, primarily the phloem and to some extent the xylem. The polar transport of auxin is facilitated by specific proteins called PIN-FORMED (PIN) proteins, which are located on the plasma membrane of plant cells and control the directionality of auxin movement.